[FFmpeg-devel] [PATCH] fftools/ffplay: 240M matrix is not the same as BT.601

[Valerii Zapodovnikov]

Can you merge my mxfdec patch? Thank you. Maybe all my oldest patches too,
except XYZ patch to libopenjpeg, that is WIP, since openjpeg did not even
merge yet or did a release to support that wrapper option.

Listen, it is commonly known that ffplay is broken, Carl agrees. MPV is not
broken and is perfect according to reference calculator here.
https://res18h39.netlify.app/color

 I did send you a sample in my "v1" patch (this is not v2, since v1 had
wrong title, so v2 would be wrong thing to do, I just superseeded patch on
patchwork). But for your comfort here it is again:
https://trac.ffmpeg.org/attachment/ticket/9167/2.mp4 (also read #9167).

Just *use* the sample above and ffplay it without any flags and ffplay
with -vf scale=in_color_matrix=bt601,format=gbrp.

I do not really care about ffplay, I care about Chromium (since I work on
it) and now VLC. You can carefully read those two issues that use the
sample above too.

https://code.videolan.org/videolan/vlc/-/issues/25651

https://code.videolan.org/videolan/vlc/-/issues/25676

As you can see from those issues I know a lot about YCbCr and read the
first documents from back when ITU-R was CCI(R). I even know that BT.709
was first defined in CCIR Rec. XA/11 1986-90f, a.k.a. IWP 11/6-2108
(Canada). That is not something you can fimd on the Internet, only in ITU-R
archives (wikipedia is me, I wrote it there). So, please, stop with this.